2906 has 4 divisors (see below), whose sum is σ = 4362.
Its totient is φ = 1452.
The previous prime is 2903. The next prime is 2909. The reversal of 2906 is 6092.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (2903) and next prime (2909).
It can be written as a sum of positive squares in only one way, i.e., 1681 + 1225 = 41^2 + 35^2
It is a Curzon number.
It is a nialpdrome in base 5 and base 8.
It is not an unprimeable number, because it can be changed into a prime (2903) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725 + ... + 728.
22906 is an apocalyptic number.
2906 is a deficient number, since it is larger than the sum of its proper divisors (1456).
2906 is a wasteful number, since it uses less digits than its factorization.
2906 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1455.
The product of its (nonzero) digits is 108, while the sum is 17.
The square root of 2906 is about 53.9073278878.
The cubic root of 2906 is about 14.2702594769.
Adding to 2906 its reverse (6092), we get a palindrome (8998).
The spelling of 2906 in words is "two thousand, nine hundred six".